The technological medium Chips and Cheese has tested and presented the advance on the performance and latency of 3D V-Cache, where this last point (latency) was controversial on this technology, so they have been testing the performance of it with the processor EPYC 7V73X (Milan-X). The test carried out on the EPYC Milan-X CPU gives very revealing details and great hope for the performance of AMD and its Ryzen processors.
First details of 3D V-Cache in Milan-X
The previous preview that has been filtered shows the first performance details, where the 3D V-Cache design of the processor stands out AMD EPYC Milan-X, where the results were compared with the CPU EPYC 7763 Milan that lacks 3D V Cache. Let us remember that the new EPYC Milan-X has a 769MB L3 cache, while the EPYC 7763 processor has only 256MB, three times less memory.
One of the points that stand out from the middle is that the performance of the cache is exceptional, in addition to the fact that the processor EPYC Milan-X it maintained better starting Clock, over the standard Milan CPU, despite having slightly lower clock rates on paper.
What can be seen in both graphs is a decrease in access time when we reach 32 KB of load, something that with the core cache is logical to happen since its layout encourages you to have to balance the load exceeded this threshold. The improvements with V-Cache are not impressive, but they are substantial to house more capacity in it and not have to go out to search for the information to adjacent cores or even to RAM, which will increase the IPC to some extent and the performance in heavier load tasks.
For its part, AMD declared that a single 3D V-Cache stack would bring 64 MB of L3 cache, so as was already mentioned at the time, in the future it is expected that we will be talking about 512 MB (64 MB x 8 CCD) of L3, added to the die’s own memory.
What awaits us in Ryzen 7000?
AMD 3D V Cache It gives rise to this type of memory increasing its density in the same space, stacking it, something similar and with a very rough comparison to what we can have in the NAND TLC seen in SSD disks to store information. The new 3D V-Cache technology is expected to be incorporated into the next AMD Ryzen processors, which will arrive this year, expected in the third quarter, and more and more details of these are already beginning to be known, since they were announced at the beginning. of the year during the CES.
At the moment the implementation of the 3D V-Cache is only available in the EPYC processors Milan-X, but it would not be ruled out that Zen 4 give us a pleasant surprise by incorporating it into their street CPUs, something that would be very good for Ryzen that are mostly used by gamers. If so, thanks to the 3D V-Cache among others, we would achieve an improvement in gaming performance of 15% -on paper- on average, leaving the Alder Lake-S in a very difficult position.
